John james dillon



J. J. DILLON.

SWITCH STAND LOCK.

APPLlCATION FILED DEC. 0. 191a.

Patented J une 10, 1919.

[J/TNESEEE IINITED STATES PATENT @FFIGE.

JOHN JAMES DILLON, OF SAULT STE. MARIE, ONTARIO, CANADA.

SWITCH-STAND LOCK.

Specification of Letters Patent.

Application filed December 5, 1918. Serial No. 265,564. D

To all whom it may concern Be it known that I, JOHN J AMES DILLON, V a subject of the Kingof Great Britain, and resident of Sault Ste. Marie, in the Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Switch-Stand Locks, of which the following is a specification.

This invention relates to improvements in switch stand locks, and the objects of the invention are to provide a simple and effective means for automatically locking the switch stand lever when the switch is operated, whereby it will be impossible for the switch or lever to be moved from the set position by jarring of the rails or by other causes until the switch stand lever is manually released, and thus to eliminate the danger of (lei-ailments and other accidents.

The invention consists essentially of the improved features hereinafter described in detail in the accompanying specification and drawings.

In the drawings:

Figure l is a side elevation of an embodiment of the invention.

Fig. 2 is a sectional elevation.

Fig. 3 is an elevation taken at right angles to Fig. 1.

In the-drawings, like characters of reference indicate corresponding parts in all the figures.

Referring to the drawings, A represents the switch stand lever of usual form, pivoted between flanges 10 and 11 on the supporting member B, which is connected to the signal post of the switch stand, the construction of the switch stand lever and the connection of the lever with the switch stand being a well known construction and not forming part of the present invention.

According to the present invention means are provided adapted to automatically lock the switch handle in lowered position, these means including gravity operated dogs and a releasing lever as hereinafter described.

12 represents a rock shaft extending through the flanges 10 and 11, which flanges together with the connecting member B form a recess or chamber 13 in which the operative parts of the lock are contained.

The rock shaft 12 projects beyond the connecting member and is provided on the outside with an operating lever 14 which is also weighted and serves to hold the rock shaft in either of its two positions, being adapted to be moved manually from one position to the other.

. Loosely mounted on the rock shaft is a locking dog 15 having a projecting end 16 designed to engage and lock with the end 17 on the switch stand lever A when the lever is in the down position as shown in Fig. 1, the downward movement of the locking dog being limited by means of a projecting shoulder 18 which engages the wall 19 on the connecting member.

20 represents the releasing dog keyed or otherwise secured to the rock shaft in such a way that it will move therewith. The dog 15 is formed with a projection 21 adapted to extend across and engage the releasing dog 20 to thereby release the same when the rock shaft is turned from one position to the other.

In the operation of the invention when the switch stand lever A is swung to down position, the locking dog 15 will at once drop by gravity to the locking position in which the end 16 engages the end 17 on the switch stand lever, preventing raising of the same, the lever 14 in this way being in the position shown in full lines in Fig. 1.

\Vhen it is desired to raise the switch stand lever it is necessary to throw the controlling lever into the position shown in dotted lines in Fig. 1 during which movement the rock shaft 12 will be turned carrying the dog 20 which will engage and release the dog 15 permitting the switch stand lever to be raised.

lVhen the lever is thus raised, the end 17 will engage the face of the releasing dog 20 thereby turning the rock shaft and releasing the locking dog so that it fnay drop into locking position again, the lever 1A swinging by gravity, as shown in full lines in Fig. 1.

It will be seen that the device shown provides for a simple and effective means for locking the switch lever in the down position and requiring a release of the lever 14: in every instance before the switch stand lever may be raised.

As many changes could be made in the above construction and many apparently widely different embodiments of my invention within the scope of the claims, constructed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting Sense.

and hold the same in a down position, manually operable releasing means for the locking means adapted to be engaged and moved from releasing position by the switch stand lever when moving to a given set position.

2. In combination, a switch stand, a supporting member, a pivoted switch stand. lever, a rock shaft, a locking dog loosely mounted on the rock shaft adapted to engage the switch stand lever, a releasing lever on the rock shaft and a controlling lever for moving the rock shaft.

3. In a switch stand and in combination, a supporting member, a switch stand lever pivotally connected to the member, a rock shaft mounted on the connecting member, a gravity operated locking dog loosely mounted on the rock shaft adapted to engage 'the end of the switch stand lever, means for limiting the movement of the locking dog, a releasing dog mounted on the rock shaft adapted to engage and release the mounted on the rock shaft adapted to en gage the end of the switch stand lever,

means for limiting the movement of the locking dog, a releasing dog mounted on the rock shaft adapted to engage and release the locking dog and adapted itself to be engaged by the switch stand lever when moving to a given set position, and a weighted lever controlling the rock shaft adapted to hold it in two given positions.

In Witness whereof I have hereunto set my hand in the presence of two witnesses.

JOHN JAMES DILLON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. V 

